Serialized since 2018 in Shueisha’s Weekly Young Jump, Shadows House is set in a mysterious, Western-style mansion populated by a clan of “Shadows” who imitate the trappings of human aristocracy.
The Shadows have no faces of their own, so they are attended by “living dolls” who act as their caretakers.
More info (including a teaser visual for the anime) will be released with the publication of Issue 48 of the 2020 volume of Shueisha’s Weekly Young Jump seinen manga magazine, which hits Japanese distributors on October 29, 2020.